1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a1a48a9e3cd84ee0162032301ebf0a96423f3dd7f41efe3b494e6bd78bb2f9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a99c9aae-8ce6-49db-8601-46f8b95e53c9.json and https://artists.proofprofile.net/proofs/artist/a99c9aae-8ce6-49db-8601-46f8b95e53c9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53082857d38e71bcaab2b910035a922f3a85665e153144cc4a4ec6b8a0daad4e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2246417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299555e8a9639fd4cc245690a8c38bf1e010d7417d5d2c3a6f9a2e50dde75c08. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKG4K2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3147fcd0c8ed586c1577b56b5867c06ddb4e21287beeb38fed62631365fcd47. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLV62008902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24986420f75fd013ce66828c323d97eacaf60878f25e71e1cbf41b921792d23. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2055135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2a1b17103b76682d3e59cfbd28ab0549b646b8a75afa814eb3fbe1a2b723d5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2046717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34e6a012d91128c174befc782e901ad43ae6e45c088d22de60bb5342b815375. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKG4K2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccc3074a0afda4a3b9626caaae7e2b7530c6c7d5c20139a91676485226287c1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2000702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff25e4b6543369ad808a6e1c2f0c0324bc5055ee83d139628d90ebe183c46be. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2000703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe0a9bd1c28c0b989f439ed1e715e32945c7b4eca4f5b64aa4bb4c737e79d9c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKG4K1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a14253250e8797b0da06a8407f2bc882f2cff43a0db3672721365cca7b71a7b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2313165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9168ab3e14d2022d90735a90f763ce2a859e19891da42e5a160e62d513237453. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKVJF2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b51d7d0b665a7ffef0630414eb769f836dfa36cea1df2eae84abaaf4a0842f2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKG4K2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616c2738186fc14531905bb30c6c82b869e39230fe7e47169ac12de8a5458807. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2456186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8959d0771d126e42d13bf6c35de5f813aa572ad1a069bc52141df1a6f8287de5. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2456187.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288360bc31f1fae94053695753e9b19d1640ae25c0b3bb47fe8d7b840abf7836. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHA2368638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a99654cb9dbecc9d9692a173be8de6db58cbec18714e46a0513bbc9f5e6367. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2122173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646261d19a9739afae8f53f1a26a646c40415466e842e809c38d1bfe6d20a0fa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBDY71900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb3fedd79971fb9694393cc44eca8cac1a5ad4d86a3020385392fc11d46b702. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBDY71900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2627d110f68fcdeff18fcea6c7a4d038e8abbe18ca5bd11fada8191872b795. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSCL1785010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35aaab57d6436e25b999097bc1622c57bf3ab9821f6aaa1f2525fac47dae260f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSCL1785009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3764d2df56e5a03be086595158b60917189c7073eecbb3bfeac5502bdbe53e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSCL1785007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc59d2f65ef16249d013f9132ccfaaef8f338da0c30353f002c75c480c23e269. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBL71800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c771a020c4b823fe584a69f3d37f9792015d1d284bcfabe900501535d59db00. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBL71500037.
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